Kasviensykemyksissä

Kasviensykemyksissä, often translated as plant circulatory systems or vascular systems, refers to the specialized tissues within plants responsible for transporting water, nutrients, and sugars. Unlike the single, centralized circulatory system found in animals, plants possess a distributed network of vascular tissues.

The two primary vascular tissues are xylem and phloem. Xylem is responsible for the upward transport of water and dissolved minerals from the roots to the rest of the plant, including the leaves. This process is largely driven by transpiration, the evaporation of water from the plant's surface. Phloem, on the other hand, transports sugars produced during photosynthesis from the leaves to other parts of the plant where they are needed for growth or storage, such as roots, fruits, and seeds. This transport can occur in both upward and downward directions.

These vascular tissues are organized into vascular bundles, which are often found throughout the stem, leaves, and roots. In dicotyledonous plants, these bundles are typically arranged in a ring, while in monocotyledonous plants, they are scattered. The continuous presence of xylem and phloem ensures that all parts of the plant receive the necessary resources for survival and growth, making the plant's vascular system crucial for its overall function and structure.